BILLOW CLOUD


Meaning of BILLOW CLOUD in English

noun

: a long narrow cloud or usually a series of such clouds roughly parallel to each other caused by the flow of one layer of air over another producing waves at their interface the relatively cold crests of which are cloud-capped and their relatively warm troughs clear when the humidity is just right

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.